Leather-skiving machine



G. 0. TERRY.

LEA-THEE smvme MACHINE.

I APPLICATION FILED AUG-25, 1919- 7 1,336,597, Patented Apr. 13, 1920.

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George 0/1 17/ T rry 39 [alsflflornqgs 'e. 0. TERRY.

LEATHER SKIVING MACHINE.

APPLICATION FILED AUG-25, 1919.

1,336,597, Patented Apr. 13, 1920.

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3 33 Z 48 I 24, 28 9 j, I 34 F T I V 50 e, Jlj 5 Z39 jzisflifornega UNITED STATES PATENT OFFICE.

GEORGE ORVILL TERRY, OF MINNEAPOLIS, lvlINNESOTA, ASSIGNOR TO ECONOMY SHOE MACHINE (30., OF MINNEAPOLIS, MINNESOTA, A CORPORATION OF MINNESOTA.

LEATHER-SKIVING MACHINE.

Application filed August 25, 1919.

To all whom it may concern:

Be it known that I, Gnonor. ORVILL TERRY, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Leather- Skiving Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to shoe machinery and more particularly skivers for repair work, of the type disclosed and broadly claimed in my U. S. Letters Patents 1,217,527, issued Feb. 27, 1917, and has for its primary object to increase the efficiency thereof and improve the construction.

To the above end, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings. which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings Figure 1 is a left-hand elevation of the improved leather-skiving machine;

Fig. 2 is a view corresponding to Fig. 1, with the exception that some parts are shown in central vertical section;

Fig. 3 is a View principally in front elevation, with some parts shown in section;

Fig. 1 is a view partly in plan and partly in horizontal section taken on the line 4-4 of Fig. 1;

Fig. 5 is a detail View principally in vertical section taken on the line 55 of Fig. 1;

Fig. 6 is a vertical section taken on the line 66 of Fig. 5 and showing a leather blank as the same is fed to the rollers and having a bevel partly cut thereon by the skiving blade;

Fig. 7 is a detail view in section taken on the line 77 of Fig. 6;

Fig. 8 is a fragmentary detail view in perspective of the blade and its hanger, with some parts shown by means of broken lines;

Fig. 9 is a perspective view of the leather blank removed from the improved machine after the beveling thereof has been completed; and Fig. 10 is a perspective view of the hanger.

The numeral 10 indicates a cast body hav- Specification of Letters Patent.

Patented Apr. 13, 1920.

Serial No. 319,568.

ing in its bottom a recess 11. Overlying the top of the body 10 is a forwardly projecting arm 12 connected to said body for vertical swinging movement by having its rear end attached thereto by a hinge 13. This arm 12, as shown in cross section, is in the form of an inverted channel and has a solid front end, in which is formed a transverse horizontal bore that affords a bearing 141 for a shaft 15. The free or forward end of the arm 12 normally rests on a stop 16 on the top of the body 10 and limits the approaching movement of the arm to the body.

Formed in the body 10 is a transverse horizontal bore that affords a bearing 17, for a shaft 18, which extends parallel to the shaft 15, and is located diretly therebelow. Intermeshing spur gears 19 are keyed to the right-hand ends of the shafts and 18 and have relatively long teeth which permit a limited lifting movement of the arm 12 without carrying the upper of said gears out of mesh with the lower one. The arm 12 is yieldingly held on the stop 16 by a coiled spring 20 located in the recess 11 and compressed between the top of said recess. and a washer 21 supported on the head of a bolt 22. This bolt 22 extends unward through the spring 20 and a bore 28 in the body 10, and has screw-threaded engagement with a collar 24, pivotally connected to the arm 12 by a horizontal pin 25 secured to the sides of said arm.

Keyed to the right-hand ends of the shafts 15 and 18 is a pair of onnosing feed rollers 26. having toothed peripheries. A. cutting blade 27, atta hed at its inner edge to a holder 28. has its cutting edge extended between the feed rollers 26 parallel to the axes thereof and preferably set rearward of a vertical plane that intersects said axes, as best shown in Fig. 6. The holder 28 is in the form of a bolt having a longitudinal slot 29 into which the inner edge of the blade 27 is inserted and detachablv se'nred to said bolt by headed dowel pins 30 inserted through alined bores in the holder 28 and blade 27.

The forward end of the holder 28 is rockably mounted in a sleeve bearing 31, which. in turn. is rockably mounted in a horizontal bore 32 formed in the body 10 at a right angle to the axes of the feed rollers 26. The forward end of the sleeve bearing 31 engages a stop shoulder 33 in the form of a sleeve 34 pressed into the bore 32 and rigidly held. It is important to note that the rear end portion of the sleeve bearing 31 projects outward and rearward of the bore 32 and is engaged by the cutting edge of the blade 27. The rear end portion of the holder 28 is screw-threaded and rockably mounted in a bore 35 formed in the body 10 in axial alinement with the sleeve bearing 31. A knurled adjusting nut 36 is applied to the screw-threaded end of the holder 28 and-held against axial movement by the sides of a notch 37 formed in the body 10.

Obviously, by turning the axially held nut 36, the holder 28 may be moved endwise and adjusted against the sleeve bearing 31, which affords a positioning stop for the cutting edge of the blade 27. Under the rocking movement of the holder 28, to angularly adjust the cutting edge of the blade, the sleeve bearing is rocked with the holder 28 to prevent a s raping engagement of the cutting edge of the blade with the sleeve bearing 31, which, of course, would, in time, either break or wear away the engaged portions of said cutting edge and thereby change the position of the cutting edge of the blade 27 in respect to the line Y, which represents a vertical plane that intersects the axes of the feed rollers 26. By using the cutting edge of the blade 27 as a stop for the blade 27, said cutting edge is not changed in relation to the line Y when the blade is sharpened.

In the forward end of the holder 28 is a notch 38 to receive a screwdriver or other tool by which said holder may be held when turning the nut 36. To remove the blade 27 from the holder 28, it is only necessary to operate the nut 36 in a direction to retract said blade and thereby move its cutting edge out of engagement with the sleeve bearing 31 and then remove the dowel pins 30, to release the blade 27 from the holder 28 and permit the same to be withdrawn from the slot 29.

The (utting edge of the blade 27 is held in the desired oblique position, in respect to the axes of the feed rollers 26, by a hanger 39 having an intermediate vertically elom gated slot 40 through which the reduced outer end of the shaft 15 projects. A collar 41, on the reduced outer end of the shaft 15, holds the hanger 39 against removal from said shaft, but with freedom for compound pivotal and axial movements in respel t thereto. The collar 41, in turn, is 'held on the shaft 15 by a washer 42, and a screw 43, having screw-threaded engagement with said shaft to clamp the washer onto the end thereof. 7

In the lower rear edge of the hanger 39 is a notch 44 into which the cutting edge of the blade 27 projects to support said blade in different rocked positions. By reference to Fig. 8, it will be noted that the notch 44 has an oblique lower surface to permit the required angular adjustment of the blade 2-7, in respect to the hanger 39, without breaking said cutting edge or causing the same to bind. A coiled spring 39, anchored to the lower end of the hanger 39 and the rear edge of the blade 27, yieldingly holds the hanger against the blade with its cutting edge in the notch 44.

The hanger 39 is raised and lowered, and held in different set positions by a knurled thumb nut 45 having screw-threaded engagement with an upwardly projecting stud 46 anchored in the collar 41 and projecting radially therefrom. The hanger 39 is connected to the nut 45 by forming on the upper end of said hanger a pair of horizontal and edgewise spaced prongs 47, which embrace the depending lower portion on the nut 45, and are held against axial movement thereon by a pair of spaced collars 48. It is important to note that the length of the slot 40 is such as to permit the required angular adjustment of the cutting edge of the blade 27, and the ends of said slot afford stops to limit the movement of said hanger and thereby prevent the cutting edge of the blade 27 from coming into engagement with either of the feed rollers 26.

A guide 49 is provided for regulating the width of a bevel to be made of a piece of leather. This guide 49 is tapered and extends rearwardly and transversely between the feed rollers 26 forward of the line Y, and the body thereof extends at right angles thereto and is mounted in a guide channel 50, formed in the face of the body 10, with freedom for endwise movement. The guide 49 is secured in the channel 50, in different set adjustments, by a washer-equipped thumb screw 51 which extends through a longitudinal slot 52 in said guide and has screw-threaded engagement with body 10.

The feed rollers 26 are turned by a crank 53 in the proper direction to feed a leather blank Z, which, as shown in Fig. 9, may be a shoe half sole, to the blade 27 to form thereon a bevel Z. The hand crank 53 is applied to the projecting right-hand end of the shaft 18 and is detachably ser'ured thereto by a set screw 54. A guard 55'is provided for the gears 19, and, as shown, is in the form of a vertically disposed plate having an inturned flange 56, which completely sur rounds said gears. The guard 55 is seured in position by forming therein a hole 57,

through which the shaft 18 projects, and is held against turning movement on said shaft by forming therein a vertically elongated slot 58, through which the shaft 15 projects, and which slot 58 is of such length as to permit the required lifting movement of the arm 12, against tension of the spring 20, to permit leather blanks of varying thicknesses to be fed between the feed rollers 26. The crank 53 holds the guard 55 against removal from the shaft 18.

As previously stated, the upper feed roller 26 will lift to permit leather blanks, of varying thicknesses, to be inserted between said feed roller, and the blade 27 will, of course, be rocked by the hanger 39 for the reason that it is carried by the shaft of said upper feed roller. By adjusting the screw 45, the angularity of the cutting edge of the blade 27 may be varied, at will, for cutting approximately the same bevel on leather blanks of different thicknesses.

In Figs. 1 and 2, the improved skiving machine is shown attached to a cast base 59 rigidly bolted in an upright position tothe top of the bench or table. This base 59 is provided on its upper end with a hub 69 which projects into the recess 11 in the body 10 and turnably supports said body thereon. A set screw 61 having screwthreaded engagement with the body 10, is provided for locking said body to the base 59. If desired, the base 59 may be bolted to a wall, and the body 10 supported therefrom 011 a short standard 62 having a large transverse eye 63 of such size as to receive the hub 60, as shown in Fig. 3. A set screw 64, having screw-threaded engagement with the standard 62, is provided for securing said standard to the hub 60. On the upper end of the standard 62 is a hub 65 of the same size as the hub 60 and adapted to extend into the recess 11 and support the body 10 thereon.

What I claim is 1. In a skiving machine, a rockably mounted holder, said holder being longitudinally adjustable, a blade secured to the holder to rock therewith, and a stop arranged to be engaged by the cutting edge of the blade to limit the longitudinal adjustment of the holder in one direction.

2. In a skiving machine, a rockably mounted holder, said holder being longitudinally adjustable, a blade secured to the holder to rock therewith, and a stop arranged to be engaged by the cutting edge of the blade to limit the longitudinal adjustment of the holder in one direction and movable with said blade-to partake of the rocking movement thereof.

3. In a skiving machine, a rockably mounted holder, said holder being longitudinally adjustable, a blade secured to the holder to rock therewith, and a stop arranged to be engaged by the cutting edge of the blade to limit the longitudinal adjustment of the holder in one direction and movable with said blade to partake of the rocking movement thereof, said stop affording a bearing for the holder.

4. In a skiving machine, a rock-bolt, a blade secured to the rock-bolt, a rockable bearing for said bolt, and means for axially adjusting the rock-bolt to hold the cutting edge of the blade in contact with said bearing as a positioning stop and to cause said bearing to partake of the rocking movement thereof.

In a skiving machine, a rock-bolt having a longitudinal slot, a blade having one.

of its edges inserted into said slot and removably secured to the rock-bolt, a rockable bearing for the rock-bolt, and means for axially adjusting the rock bolt to hold the cutting edge of the blade in contact with said bearing as a positioning stop and to cause said bearing to partake of the rock ing movement thereof.

6. In a skiving machine, a rock-bolt, a blade secured to the intermediate portion of the rock-bolt, a rockable sleeve bearing for one end of the rock-bolt, a fixed bearing for the other end of the rock-bolt, and an adjusting nut having screw-threaded engagement with the rock-bolt and held by the fixed bearing against axial movement, said adjusting nut being arranged to impart an endwise movement to the rock-bolt to carry the cutting edge of the blade into engagement with the sleeve bearing as a positioning stop therefor and to cause said sleeve bearing to partake of the rocking movement thereof.

7. In a skiving machine, a body having alined front and rear bores, the former of which is provided with a stop, a sleeve bearing rockably mounted in said front bore, a rock-bolt mounted in said rear bore and sleeve bearing, a blade secured to the rockbolt between the rear bore and sleeve hearing, and a held nut having screw-threaded engagement with the rock-bolt for imparting endwise movement thereto to carry the cutting edge of the blade into engagement with the sleeve bearing as a positioning stop therefor and to cause said sleeve bearing to partake of the rocking movement thereof.

8. In a skiving machine, a blade, a rockably mounted holder to which the blade is attached at one end of its cutting edge, and means for adjustably supporting the blade at the other end of its cutting edge, leaving said blade between said holder and support ing means entirely free from its cutting edge to its back.

9. In a skiving machine, a pair of opposing feed rollers, a rockably mounted holder to which the blade is attached at one end of its cutting edge, and means for adjustably supporting the blade at the other end of its cutting edge, whereby the angularity of said cutting edge may be varied, at will, in respect to the cooperating faces of the feed rollers, said means also limiting the adjustment of the blade to prevent its cutting edge from engaging said rollers, saidblade, between its holder and supporting means,

being entirely free from the cutting edge to the back thereof.

10. In a skiving machine, a pair of opposing rollers, one of which is resiliently supported in respect to the other, a rockable holder, a blade attached at its inner edge to the holder to rock therewith, a hanger pivotally hung on the resiliently supported roller, said hanger having a notch to receive the cutting edge of the blade at the outer end thereof with freedom for angular movement in respect thereto, and means for adjusting the hanger to angular-1y adjust the cutting edge of the blade in re spect to the operating faces of the feed rollers.

11. In a skiving machine, a pair of opposing feed rollers, one of which is resiliently supported in respect to the other, a rockable holder, a blade attached at one of its edges to the holder to rock therewith, a hanger having an intermediate elongated slot through which the journal for the resiliently supported feed roller projects, said hanger having on its lower end a notch to receive the cutting edge of the blade at the outer edge thereof, with freedom for angular adjustment in respect thereto, a spring yieldingly holding the blade in said notch, a screw-threaded stud carried by the journal of the resiliently supported roller, and an adjusting nut on the stud attached to the upper end of the hanger for raising and lowering the same to change the angularity of the cutting edge of the blade in respect to the operating faces of the feed rollers.

12. A skiving machine including a body the body and the'other on the arm, and a blade mounted on the body.

13. A skiving machine including a body,

a blade attached to the body, a horizontally disposed resiliently held bearing arm overlying the body and hinged thereto for vertical swinging movement, a pair of opposing feed rollers having shafts journaled, the one on the body and the other on the arm, inter-meshing gears on said two shafts, a guard incasing the gears and having holes through which said two shafts project to support and hold said guard and permit the required swinging movement of the arm, and means on one of said shafts for rotating the same and for holding the guard against removal therefrom.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE ORVILL TERRY. WVitnesses:

WINIFRED I. WARD, HARRY D. KILeoRn. 

